| Poplar Bluff to Olivares | 4,470.78 mi (7,195.02 km) |
| Poplar Bluff to Olivenza | 4,384.23 mi (7,055.74 km) |
| Poplar Bluff to Olot | 4,710.18 mi (7,580.30 km) |
| Poplar Bluff to Onate | 4,463.56 mi (7,183.40 km) |
| Poplar Bluff to Onda | 4,663.25 mi (7,504.78 km) |
| Poplar Bluff to Onteniente | 4,686.76 mi (7,542.61 km) |
| Poplar Bluff to Orihuela | 4,696.44 mi (7,558.19 km) |
| Poplar Bluff to Osuna | 4,527.55 mi (7,286.38 km) |
| Poplar Bluff to Ourense | 4,237.03 mi (6,818.84 km) |
| Poplar Bluff to Oviedo | 4,299.08 mi (6,918.70 km) |
| Poplar Bluff to Paiporta | 4,674.57 mi (7,522.99 km) |
| Poplar Bluff to Pajara | 4,366.05 mi (7,026.48 km) |
| Poplar Bluff to Palafolls | 4,739.81 mi (7,627.98 km) |
| Poplar Bluff to Palafrugell | 4,749.26 mi (7,643.19 km) |
| Poplar Bluff to Palamos | 4,750.29 mi (7,644.85 km) |
